Abstract:

Anode materials are an important part of lithium-ion batteries. However, the current commercial lithium-ion battery anode materials have a low energy storage density, which is insufficient to satisfy the needs of the development of social productivity. Therefore, new high-capacity lithium-ion anode materials must be developed. Among the numerous candidate materials, transition-metal-oxide anode materials have attracted considerable attention due to their large theoretical capacity and excellent lithium storage performance. However, the application of transition-metal-oxide anode materials is limited by their low conductivity, poor cycle, and rate performances. To improve the electrochemical performance of transition-metal-oxide anode materials, researchers had conducted a number of research and achieved certain progress. This paper reviews the related achievements in recent years. The modification and optimization of transition-metal-oxide materials are described from two aspects: modification of transition-metal-oxide materials (morphology and size control, composite with other good performance materials) and preparation of new metal oxide anode materials (binary metal oxides). The key factors affecting the lithium storage performance of the materials are also discussed. The analysis shows that the nanomaterials are beneficial to slowing down the pulverization and prolonging the life cycle of the material. The synergistic effect can be achieved through combining with other materials to compensate its own defects. The binary metal oxide is an important topic in the research of transition-metal-oxide anode materials. Finally, the development prospect of transition-metal-oxide anode materials is prospected.

Key words: transition metal oxide, anode material, material modification, binary metal oxide